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y <br /> TLSubmission 2004-11-0843 <br /> Gas/BTEX Fuel Oxygenates by 82608 <br /> TRC Alton Geoscience- Irvine <br /> Attn Anju Farfan <br /> 21 Technology Drive <br /> Irvine, CA 92715 <br /> Phone (949) 341-7440 Fax (949) 753-0111 <br /> Project 41050001 FA20 Received 11/29/2004 18 20 <br /> Conoco Phillips#08671 <br /> Site 8606 Thornton Road, Stockton <br /> Batch QC Report <br /> Prep(s) 50306 Test(s) 8260FAB <br /> Matrix Spike ( MS/MSD) Water QC Batch#2004112106-1A 64 <br /> MS/MSD Lab ID 2004-12-0081 -001 <br /> MS 2004112106-1A 64-028 Extracted 12/0612004 Analyzed 12/06/2004 09 28 <br /> Dilution 100 <br /> MSD 2004112106-1A 64-051 Extracted 12106/2004 Analyzed 12/06/2004 09 51 <br /> . Dilution 1 00 <br /> Compound Conc Ug 1L 5 k Leve Recovery% Limits% Flags <br /> MS MSD Sample uglL MS MSD RPD Rec RPD MS MSD <br /> Methyl tert-butyl ether 253 274 126 25 962 1096 130 65-165 20 <br /> Benzene 235 256 ND 25 940 1024 86 69-129 20 <br /> Toluene 228 252 ND 25 912 1008 100 70-130 20 <br /> Surrogate(s) <br /> 1 2-Dichloroethane-d4 475 464 500 950 928 73-130 <br /> Toluene-d8 446 1458 500 1892 91 6 81-114 <br /> Severn Trent Laboratories, Inc 12/101200417 21 <br /> STL San Francisco'1220 Quarry Lane,Pleasanton CA 94566 <br /> A part of 8e em Turd Pic Tel 925'484 1919 Fax 925 484 1096'www stl-mc com♦CA DHS ELAP#2496 Page 22 of 24 <br />